Finland was the first country in the world to implement a carbon tax in 1990. This innovative step was aimed at reducing carbon dioxide emissions and mitigating the effects of global warming. A carbon tax is a fee imposed on the burning of carbon-based fuels (coal, oil, gas) and it encourages individuals and companies to reduce their carbon footprint by making fossil fuels more expensive. By doing so, it provides a financial incentive to reduce reliance on fossil fuels and promotes the use of renewable energy sources. This approach by Finland inspired many other countries to consider similar measures to combat climate change globally.